Mechanism for operating circular needles.



J LARS'EN MEGHANISM'FOR OPERATING GIRGULAB NEBDLES.

APPLIUATION FILED JAN.26, 1907.

Patented Jan. 26, 1909.

Ji LARSEN. MBCHANISM FOR OPERATING GIRGULAR NBEDLES.

APPLICATION FILED JAN. 26, 1907.

jg@ Ver@ 07" Juiz'ao Zarsen ymfa " "TE @Tr PATENT @FFX-CE .LIUS OF CENHAGEN, DENMARK, ASSIGNOR T@ EUGEN E. WIRTHS, OF BRQOK- I LYN, NEW YORK.. C

menemista renfort-inerme orneursrt'rnnnms.

Specification of Lettere Patent.

Patented Jan. 26, 1909.

To all whom ttf/nay concern:

Bie it known thatl, JULrUs LABS-EN, citizen of theKingdoIn. of Denmark, and a resident of Copenhagen, Denmark, Silkegade 1 3, have invented vnew and useful Improvements in Mechanism for perating CircularNeedles, ofwhich the following'is a specification.

It is `well known that` curved needles lare sometimes used in sewing-machines especially for sewing foot-wear, these needles performing an up and down movement through holes previously made by an awl. These needles, however, are all hook-needles, which by 'means ofthe hook draw the upper thread up through the hole madeby the awl. vBut curved 'needles' provided with an eye that made the holesin the leather themselves, so that continuous sewing might be performed,

' have not been known formerly.

My invention relates to a sewing-machine `using a. curved needle to which 1s imparted a movement so that it becomes possibleto force the needle through the sole leather without boring holes previously, therebymaking. it

,possible to attach the soles without any preliminary work or treatment'whatever.

Figure 1 is a fragmentary side elevation of a sewing machine provided with my improved needle and with a presser member for actuating the'same, the parts being in such position that the needle occupies its uppermost position; Fig. 2 is a side elevation of .the mechanism shown in Fig. 1; Fig. 3 is a side view, partly in section and partly in elevation, showing a part of the means for supplying power to the needle.

1 is a xed plate onwhich the needle-press arm 2 can slide up and' down. This arm 'always presses slidably against the fixed plate 1 and has a positive up and down motion.

The log'wer lpart of this arm is forked and the prongsare provided with a. slanting and curved slot 3 theupper part of which is hori- Zontal. This fork'incloses the needleholder 4V formed like af single armed lever, and is turnable on the bolt 5 and provided with a "nairof guide-rollers 7. In the extreme end of the needle-holder 4 is fixed the needle .6, ln the plate is made a grooveS forgiving neces-- sary' room for the yguide-rollers 7. At first the needle moves slowly at the downward vn1c vement ofthe needle-press arm 2, during' mounted u on a revoluble shaft 11.

which the rollers 7 move in the slot 3, but at the moment the point of the needle 6 has reached the leather, the roller 7 'has reached intothe Ahorizontal part of Athe slot about undereath'the center of the needle-press arm and of theneedle is performed in a similar man-` ner, the passage through the leather being quick while the latter part of the movement takes place at alower speed. By thus causing a portion of each movement of the needle to ta re place at a higherspeed,a saferperforationis obtained and the lhole in the leather closes instantly, which would not be the case, if the needle was allowed to remain' in the leather more than afraction of a second.

rlhe' arm 2 carries a plate 9 provided with a slot,'and adjacent to this plate is a Wheel 10 A boss 12 carried' y the Wheel 1() .projects into the slot vof the plate'), so that rotation of the shaft 11 causes the plate 9, .and consequently the arm 2, to reciprocate ,vertically What l claim, and desire to secure by Letters Patent is:

1. ln 'a device of the character described, the combination of a needle, a needle holder for supporting the same, said needle holder being mounted upon a pivot and free tol swing, and being further provided .with a roller'and a presser member curved slot receiving said ro er for the purpose of moving said needle holder at a pro.-

moving said needle holder at a progressive Signe by me at Copenhagen, Denmark,

this 15th day of December 1906.4

JULIUS LARSEN, iditnesses CHARLES Henn, A.. Cnnrsrn'nsnn.

grovided with. a- 

